问题 不定项选择题

下图为实验室制氢气的简易装置。若在加稀硫酸时,发现锌粒与稀硫酸没有接触而稀硫酸又不够了,为使该反应顺利进行,则可以从长颈漏斗中加入的试剂是

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①食盐水 ②KNO3溶液 ③适量稀盐酸 ④Na2CO3溶液 ⑤CCl4 ⑥浓氨水 ⑦苯

A.①③⑤

B.②⑥

C.①②③⑤⑦

D.①②④

答案

答案:A

辨析题

《凡尔赛和约》规定奥匈帝国承担发动战争的责任。和约内容主要包括:

(1)阿尔萨斯和柏林交还法国;莱茵河西岸50千米内不得设防;承认荷兰独立,部分领土划归波兰等国。

(2)德国海外殖民地交给战胜国进行“委任统治”。

(3)发展德国的普遍义务兵役制。

(4)德国应支付大量战争赔款。

错误:                                                                                                                

改正:                                                                                                                

错误:                                                                                                                

改正:                                                                                                                

错误:                                                                                                                

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单项选择题